CURRENTS OP THE OCEAN. 
33 
and count™. U P rbl( dple is based the whole system of currents 
equinoctial C ^® nts ' - Eie differences of temperature between 
the iinner 10 coimtries generate two opposing currents, 
°ne directed , P^^g from the Equator to the Poles, the lower 
Equator thi c n “ 63 ^ wards the Equator. On reaching the 
and ascends to'tl j CUUeut ° f air from the Poles is warmed and rarified, 
led to its point :/r T )eClS ° f T the atmos P bore ’ whence it is again 
with th C d6P t i * is cooled, and returns 
^2Z n Z2t “ ^ tr0piCld ^ But the 
spheric currents Th ^ mo<bbes * be direction of these atmo- 
east heinTZl is ca ™ d from west to 
the Equator, it follows that tlmcon*’' ^ mC ° nCeivabl y ra P id un<ler 
towards the Tropics ouehf • r ^v’- P ro P ortl011 as it advances 
» i«t l r * 7" t* ae ** 
trade-winds which nrevail ’ n C °, nU 01 curre nts. The north-east 
of spiral cJ’vMut IZ the wlT ^ h T pWo > «" “ a «*t 
Equator, and in the opposite direction h '° m , the I>oles to the 
towards the Poles - the immerli + e y m ove from the Equator 
— *> of ft. eakh T ?." 4 " **« 
“ moves from west to east Nr™ p ■ eart l ’ says E r. Maury, 
sphere at the North Pole wher if 1 T magme a P artu ‘ Ie of atmo- 
straight line towards ZV * t0 be V* itt action in a 
», «"*« ■>»» «» particle of 
take of the diurnal IS™ “'T*" 1 * 1 “‘‘““h where it did not par- 
tied a, it travelled south that H ^ I*"*"*" ° f lte o'™ **> 
wore, and it sl?dll‘ “ 7 “7 T *#* «- «*r it . „ i 
towards the south-west • in otl """i 1,111 the north-east and going 
In the saMe nll; the ” ™*’ “ '™ H *•» »-««- wind? 
towardsthePoloswiti, ennitn ' * ?“ reUlS 0t ““h Vhii proceed 
spheric b*. ££%£££**”* «-** * — - 
towards the Poles and turn « “ , b smaUer rapidity of motion 
These are the south-west and Mrth^t 7 T “ 
P»i„g ,b„ v e the m th and ,„Xt7 ““7 “"w 1 -*, which. 
Of sea in the latitude, of the 7 
separated by a belt 1 i m P eiate zone - J-he two trades are 
- ‘he *“,7 ***» experienced 
general, the current “rTSTS J, *"+ »«t; in 
6 ls an ascending current. This belt 
